Gerni MH 4M, Operating Instructions Manual

Page: 19 / 24

1) Optional accessories / Option depending on model
Original instruction
19
B6. Antiscale adjustment
1. Open cabinet (A).
Measure the water hardness or ask your water supply company.
2. Adjustment knob (B) setting
according to rated water flow
mg/l Grains °dH °e °f ppm Ca Description 9-15
L/min
16-20
L/min
21-26
L/min
27-33
L/min
.0-17 0-1
0-7 0-8,8 0-12,5 0-50
Soft 0 0 0 0
17-60 1,1-3,5 Slightly Hard 0,5 1 2 2
60-128 3,6-7,5 7-14 8,8-17,5 12,5-25,1 51-150 Moderately Hard 1 1,5 2,5 3
128-180 7,6-10,5 14-21 17,5-26,3 25,1-37,6 151-300 Hard 1,5 2 3 3,5
>180 >10,5 >21 >26,3 >37,6 >300 Very Hard 2 3 3,5 4
Indications on Display
Indication lights Display Cause Remedy
Constant
0024
- The appliance is ready for operation.
- At power on to cold mode, hour coun-
ter is shown for a few seconds.
Flashing
- Water tap closed or water shortage.
- Detergent tank empty.
- Pressure regulation on the safety con-
trol blocks or the VarioPress
1)
lance is
set to low water volume.
- Machine scaled.
- Check water supply.
- Refill detergent or set Detergent knop to “0“.
- Change setting on safety control block / Vario-
Press to allow full water flow.
- Contact dealer/service dpt.
Flashing
FLO - Machine has run for more than 120s
without propper water supply. Machine
shuts down to avoid pump over-
heating.
- Restart machine, if fault continues
- Contact dealer/service dpt.
Constant
FUE - Low fuel level.
- Cold water operation possible. - Check fuel level and refill, error reset after 5
sec.
Constant
- Low Nilfisk AntiStone level 1) .
- Machine is still operational.
- Check Nilfisk AntiStone level and refill.
Constant Constant
- Service interval has expired.
- Machine is still operational. - Contact dealer/service dpt.
Constant Flashing
- Service interval due in 20 hours.
- Machine is still operational. - Contact dealer/service dpt.
Constant
HOS - Boiler overheated. Exhaust sensor
(EXT-H) has cut off fuel supply.
- Machine scaled.
- Boiler not serviced.
- Cold water operation is possible.
- Contact dealer/service dpt.
Constant Constant
LHE - Flame sensor (B7) is sooted.
- Ignition or fuel system failure.
- Cold water operation is possible. - Clean flame sensor (B7).
- Contact dealer/service dpt.
Flashing Flashing
LHL - Boiler is over sootet and needs
service.
- Boiler is filled with diesel.
- Contact dealer/service dpt.
Constant Constant
HOP - Motor is overheated. - Turn main switch to “OFF” position - let the
machine cool down.
- Remove/disconnect extension cable.
- Possible phase failure.
- Have electrical connection checked.
- Contact dealer/service dpt.
Constant Flashing
Flashing
SEC
SEO
- Temperature sensor shorted.
- Temperature sensor is disconnected.
- Cold water operation is possible.
- Contact dealer/service dpt.
Constant Constant
FLF - Flow sensor fault. - Contact dealer/service dpt.
Constant
POL - Low pump oil.
- MPU is leaking oil. -Check oil lever and refill.
- Contact dealer/service dpt.